Furnace



(No Model.)

W. SLOAN.

. FURNACE.

Patented Apr..19,'1892.

UNTTED STATES PATENT OFFICE.

W'ESLEY SLOAN, OF PEORIA, ILLINOIS.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 473,268, dated April19, 1892.

Application filed December 30, 1891. Serial No. 416,559. (No model.)

To all whom it may concern:

Be it known that I, IVESLEY SLOAN, a citizen of the United States,residing at Peoria, in the county of Peoria and State of Illinois, haveinvented certain new and useful Improvements in Furnaces; and -I dohereby declare the following to be afull, clear, and eX- act descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

This invention relates to improvements in furnaces.

The object of the invention is to provide a furnace in which the coldair may be drawn through a pipe passing into and up through thefire-pot, and thus the air in the said pipe may be heated by a part ofthe heat which is generally wasted in passing out of the smokeflue.

In the drawings hereto annexed, Figure 1 represents a vertical sectionof the furnace; and Fig. 2 represents a sectional plan View of thefurnace through dotted line a: 00, Fig. l.

A represents the fire-pot, which may be arched at the top, as shown, andin the top of which is cut an opening, into which is set a pipe B. Thispipe extends downward for some distance at about half-way, then turns atright angles to the vertical portion thereof, and passes out through theside or back of of the furnace into the open air outside of the buildingin which the furnace may be placed.

A shell C surrounds the furnace proper (or fire-pot) and also the topthereof. This shell drops down to near the bottom of fire-pot, which isgenerally the hottest part of the said fire-pot. Now an outer casing D,usually used with furnaces of this character, surrounds the whole and inthe top of which are the usual heat-conduit pipes G. The openings of thefire-pot and ash-pit are shown by the letters E and F, respectively.

The smoke-flue is shown by H, and I I represent stays to secure theshell 0 in place.

A draft of air is formed from the rooms above the furnace through thepipes G and through the spaces between the shells D and O and fire-pot Aand the pipe B. The cold air enters the pipe B immediately over the fireand is drawn out of the said pipe and is carried down between thefire-pot and the easing 0 and surrounds the hottest part of saidfire-pot and thence passes up between the outer casing D and the saidcasing O to the pipes G and into the rooms to be heated.

I claim 1. In a hot-air furnace, the fire-pot A, having the cold-airduct placed therein admitting air from below and delivering it at thetop of said fire-pot, in combination with the intermediate shell O,dropping to a position near the bottom of fire-pot, and the outer shellD,

substantially as herein set forth and described.

2. In a hot-air furnace, a cold-air duct B, entering at the side or backof furnace and fire-pot and delivering air at the top of firepot, incombination with the outer casing D and the intermediate casing O,placed between the said fire-pot and said outer casing D, said casing Odropping to a point near the bottom of fire-pot, for the purposes hereinset forth and described.

In testimonywhereof I affix my signature in presence of two witnesses.

WESLEY SLOAN. WVitnesses:

E. R. CLAYTON, A. KEITHLEY.

